21130312210 has 16 divisors (see below), whose sum is σ = 43468070976. Its totient is φ = 7244678448.

The previous prime is 21130312157. The next prime is 21130312211. The reversal of 21130312210 is 1221303112.

It is not an unprimeable number, because it can be changed into a prime (21130312211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150930732 + ... + 150930871.

It is an arithmetic number, because the mean of its divisors is an integer number (2716754436).

Almost surely, 2^21130312210 is an apocalyptic number.

21130312210 is an abundant number, since it is smaller than the sum of its proper divisors (22337758766).

21130312210 is a wasteful number, since it uses less digits than its factorization.

21130312210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301861617.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21130312210 its reverse (1221303112), we get a palindrome (22351615322).

The spelling of 21130312210 in words is "twenty-one billion, one hundred thirty million, three hundred twelve thousand, two hundred ten".